16668025 has 12 divisors (see below), whose sum is σ = 22547664. Its totient is φ = 12122000.

The previous prime is 16668013. The next prime is 16668037. The reversal of 16668025 is 52086661.

It is an interprime number because it is at equal distance from previous prime (16668013) and next prime (16668037).

It is not a de Polignac number, because 16668025 - 2⁷ = 16667897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30031 + ... + 30580.

It is an arithmetic number, because the mean of its divisors is an integer number (1878972).

Almost surely, 2^16668025 is an apocalyptic number.

It is an amenable number.

16668025 is a deficient number, since it is larger than the sum of its proper divisors (5879639).

16668025 is a wasteful number, since it uses less digits than its factorization.

16668025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60632 (or 60627 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 16668025 is about 4082.6492624275. The cubic root of 16668025 is about 255.4434166336.

The spelling of 16668025 in words is "sixteen million, six hundred sixty-eight thousand, twenty-five".